*,::after,::before{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
ul,ol{
    list-style: none;
}
a{
    text-decoration: none;
    color: #000;
}
input{
    border: none;
    outline: none;
}
.f_left{
    float: left;
}
.f_right{
    float: right;
}
.clearfix::before,.clearfix::after{
    content: "";
    height: 0;
    line-height: 0;
    display: block;
    visibility: hidden;
    clear: both;
}
.m_l10{
    margin-left: 10px;
}
.m_r10{
    margin-right: 10px;
}
.m_b10{
    margin-bottom: 10px;
}
.m_t10{
    margin-top: 10px;
}